/******************************************************************************
/// @copyright Copyright (c) 2017 <dji-innovations, Corp. RM Dept.>
/// @license MIT License
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to deal
/// in the Software without restriction,including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense,and/or sell
/// copies of the Software, and to permit persons to whom the Software is furnished
/// to do so,subject to the following conditions:
///
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
/// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
/// THE SOFTWARE.
*******************************************************************************/
#include <stdio.h>

/*要使用这个功能必须有SWO线。也就是5线jlink，4线不够*/
#define ITM_Port8(n) (*((volatile unsigned char*)(0xE0000000 + 4 * n)))
#define ITM_Port16(n) (*((volatile unsigned short*)(0xE0000000 + 4 * n)))
#define ITM_Port32(n) (*((volatile unsigned long*)(0xE0000000 + 4 * n)))
#define DEMCR (*((volatile unsigned long*)(0xE000EDFC)))
#define TRCENA 0x01000000

struct __FILE
{
    int handle; /* Add whatever you need here */
};

FILE __stdout;
FILE __stdin;

int fputc(int ch, FILE* f)
{
    if (DEMCR & TRCENA)
    {
        while (ITM_Port32(0) == 0)
            ;
        ITM_Port8(0) = ch;
    }
    return (ch);
}
